Professional LAMP: Linux®, Apache, MySQL®, and PHP5 Web Development

A.1. Comments

A.1.1. Comments

PHP

// Single-line comment

/*
Multi-line comment
*/

ASP/VBScript

' Single-line comment

ASP.NET/C#

// Single-line comment

/*
Multi-line comment
*/

JSP/Java

// Single-line comment
/*
Multi-line comment
*/

A.1.2. Variable Typing

PHP

Loose

ASP/VBScript

Loose

ASP.NET/C#

Strong

JSP/Java

Strong

A.1.3. Variable Declaration

PHP

$variable = value;

ASP/VBScript

Dim variable

ASP.NET/C#

type variable;

JSP/Java

type variable;

A.1.4. Constant Declaration

PHP

define('NAME', value);

ASP/VBScript

Const name = value

ASP.NET/C#

const type name = value;

JSP/Java

visibility final type = value;

A.1.5. Creating Arrays

PHP

$name = array(elem1, elem2, elem3);

$name = array('key1' => elem1, 'key2' => elem2, 'key3' => elem3);

ASP/VBScript

Dim name(length)

ASP.NET/C#

type[] name = new type[length];

JSP/Java

type[] name = new type[length];

A.1.6. Referencing Array Elements

PHP

$name[index]
$name['key']

ASP/VBScript

name(index)

ASP.NET/C#

name[index]

JSP/Java

name[index]

A.1.7. Conditional Evaluation

PHP

if (condition) {
...
} elseif (condition) {
...
} else {
...
}

ASP/VBScript

If condition Then
...
ElseIf condition Then
...
Else
...
End If

ASP.NET/C#

if (condition) {
...
} else if (condition) {
...
} else {
...
}

JSP/Java

if (condition) {
...
} else if (condition) {
...
} else {
...
}

A.1.8. Multiple-Choice Selection

PHP

switch (expr) {
  case value1:
    ...
    break;
  case value2:
    ...
    break;
  default:
    ...
}

ASP/VBScript

Select Case expr
  Case value1
    ...
  Case value2 ... Case Else ...